预制钢桁架混凝土组合剪力墙抗震性能研究

将型钢桁架代替普通钢筋配置在钢筋混凝土剪力墙中形成钢桁架混凝土组合剪力墙,该剪力墙便于预制和安装,适合用于装配式建筑。采用ABAQUS有限元分析建立了钢骨混凝土剪力墙的抗震分析模型,利用试验数据进行了验证。进而使用该模型研究了钢桁架混凝土组合剪力墙的抗震性能,对5个不同设计参数的钢桁架混凝土剪力墙进行了往复加载模拟,研究轴压比和型钢含钢率对其滞回性能、变形能力、刚度退化以及耗能能力的影响。结果表明:轴压比增大对于钢桁架混凝土组合剪力墙的变形能力和耗能能力均不利;增加型钢柱的含钢率能有效提高剪力墙的抗剪承载力,增加型钢腹杆的含钢率对剪力墙耗能能力的提高明显,对承载能力提高较小。

Study on seismic performance of prefabricate steel truss-concrete composite shear wall

The steel trusses can be used to replace the normal reinforcement to form the precast steel truss-concrete composite shear wall, which is conveniently prefabricated and installed and very suitable for prefabricated constructions.Seismic analysis model of steel-concrete shear wall was established by ABAQUS and validated by test data.Thus, the seismic performance of precast steel truss-concrete composite shear wall was studied by the model, and the cyclic loading simulation on five steel truss-concrete shear walls with different design parameters was carried out to investigate the influence of axial compression ratio and steel content on its hysteretic performance, deformation capacity, stiffness degradation and energy dissipation capacity. The results show that the increase of axial compression ratio is disadvantageous to the deformation capacity and energy dissipation capacity of the shear wall. Increasing the steel ratio of the truss chord can effectively improve the shear bearing capacity of the shear wall, and increasing the steel ratio of the truss web has significant effects on improving the energy dissipation capacity of the shear wall, but has little effect on the load bearing capacity.